Chapter 2 Flashcards

1
Q

what does mA stand for

A

current

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2
Q

what does s stand for in mAs

A

seconds

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3
Q

The timer on the x-ray generator is

A

when radiation is produced

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4
Q

what is the maximum kilovolts in vet x-rays `

A

125

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5
Q

Voltage controls the

A

penetrability of the x-ray beam

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6
Q

The operating console is referred to as

A

generator

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7
Q

voltage is

A

kV

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8
Q

When you increase the Kv you also increase the

A

penetrating power

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9
Q

What are the 3 components of the X-ray unit

A
  1. High voltage transformer
  2. X-ray generator (control panel)
  3. X-ray tube
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10
Q

High voltage transformer is located where

A

beneath the x-ray table

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11
Q

The x-ray generator receives its power from where

A

high voltage transformer

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12
Q

where does the power end up from the x-ray generator

A

x-ray tube

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13
Q

Current (mA) controls

A

Controls the number of photons/density of the image

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14
Q

X-ray generator and high-voltage transformer are matched

A

as a pair

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15
Q

The Cathode, Two filaments in a focusing cup

A

Large and small
Made of thoriated tungsten
Boils off electrons when the exposure switch is closed

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16
Q

Focusing cup

A

Slightly negatively charged
Beveled edges

17
Q

Space charge effect

A

Occurs as the electrons are boiled off

18
Q

The Anode, Tungsten plate with beveled edge

A

Focal spot
The electron beam is focused to this point

19
Q

Partner to the cathode Two types

A

Rotating and Stationary

20
Q

Rotating

A

invented to dissipate heat on one spot

21
Q

Stationary

A

used in lower kV units (dental units, large animal portables)

22
Q

Bremsstrahlung interactions

A

Incoming electron almost hits tungsten electron

23
Q

Characteristic interactions

A

Incoming electron ejects inner shell of tungsten atom

24
Q

Exposure of heat dissipation

A

1% x-rays, 99% heat